Method of drying molds



L. R. LEMOINE.

METHOD OF DRYING MOLDS.

APPLICATION HLED MAY 27. 1921.

Patented July 41, 119220 2 SHEETSSHEET 2.

UNHIFEE STATES PATENT FE H@E..

LOUIS R. LEMOINE, 0F PHILADELPHIA, PENNSYLVANIA, ASSIGNOR I30 UNITED STATES CAST IRON PIPE & FOUNDRY A CORPORATION OF N EW JERSEY.

COMPANY, OF BURLINGTON, NEW JERSEY METHOD OF DRYING MOLDS.

i,4l21l,791.

- Application filed May 27 molds or the like and has for its object to provide amethod for drying such molds rapidly, uniformly and with economy in the use of gas. Broadly speaking, my new method consists in connecting two or more molds in series and assing drying gases through the connected molds. By preference, the drying gases are passed through the connected molds alternately in opposite directions.

The nature of my invention and what I .believe to be the best method of carrying it into effect will be understood as described in connection with the drawin in which Figure 1 is an elevation s owing the edge of a turntable carrier to which a double mold flask is attached, the flask of molds therein being shown in vertical section, a device being also shown for connecting the tubes-of the molds and burners and being indicated as in registry with the bottoms of the molds. 2

Figure 2 is a plan view of the portion of the turntable shown in Fig. 1 with five double flasks shown as attached to it-and the location of the burners indicated. Only one of the flasks is shown as provided with.

a cover connecting the double molds.

Figure 3 is a front view showing a portion of the turntable such as 'is shown in Fig. 1 with a number of single mold flasks suspended from it, two of the flasks being shown in vertical section and shown as provided with cover devices connecting them in pairs. This view also indicates the location of the burners for use with this arran ement of flasks.

igure 4 is a plan view of the edge of the turntable and of the flasks, only one pair of flasks being indicated as provided with a cover, and Y Figure 5 is a. sectional view showing three Specification of Letters Patent.

Patented July 4 1922.

, 1921. Serial No. 3,101.

molds connected in series and supplied with heating gases at the open top of one mold.

A indicates the turntable which is of old and familiar construction and the table supporting a peripheral ledge indicated at B and a saddle ring indicated at C. D, Figs.

1 and 2, indicates a double mold flask to one edge of which is secured a hook E adapted to hook over the ledge B,-the lower part of the flask edge resting against the saddle ring C. F and F indicate the pipe molds in the flask. G is a connector cover which when set on top of the flask, as-shown, connects the top of the two molds F and F.

H and H indicate burners located in such relation to the turntable that they will register with one of the molds in each flask in each intermittently stationary position of the molds, thepburners being also so arranged that they will register alternately with different molds of the flask.

1D and 2D", Figs. 3 and 4, are single mold flasks secured to the turntable in the same way as the flask D and connected in pairs by. cover conduits G which cover conduits for this use have bottom portions indicated at G which bridge the space between each pair of molds and prevent the escape of gases. In this construction the burners indicated at H are somewhat difl'erently arranged from the arrangement shown in Figs. 1 and 2 but as before their arrangement is such that with the intermittent movement of the molds the burners register alternately with the bottoms first of one and then of the other of connected pairs of molds.

At J, Fig.{ 3, I have shown a chill plate and socket in position in the bell end of the flask and indicated that the socket can be dried at the same time as the body of the mold.

In Fig. 5 I show three molds d, d, (F,

connected in tandem by the bridge pieces 9 v g and I have shown a burner h arran ed to connect with the top of mold 03, this arrangement being practicable, though I prefer to introduce the heating and drying gases at the bottom. The connection in series of more than two molds has the advantage of providing for greater economy in the use 0 heated gases.

Referring to Figures 1 to 4, in operation one of the molds is brought to register with theother of the connected pairs of molds will register with a burner whereupon the burner gases will again pass through the molds but in the opposite direction.

Very obviously by my method of drying molds the heat. of the burning gases is availed of to the greatest possible extent; both of the airs of connected molds are subject to similar conditions as to heating and a fewer number of burners can be employed.

I have shown gas burners as the source of heated drying gases but it will be understood that drying gases may be supplied from any source and heated in any convenient way.

Having now described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. The method of drying molds which consists in co'nnectinga plurality ofmolds in series and passing drying gases through the connected molds from one end to the other of the connected series.

2. The method of drying molds which consists in connecting a lurality of molds in series and passing drylng gases through the connected molds from one end to the other of the connected series in alternately reversed directions.

3. The method of drying molds which condownward sists in connecting a plurality of molds in series, supporting sald connected 7 set of molds on an\ intermittentl moving carrier, providing means for supp ying heated gases arranged so that one of said means will register with one end of a set of connected molds-in one intermittently'stationary po sition of the carrier and another of said means will register with the other end of said connected set of molds in another'intermittently stationary position of the carrier and so shifting the carrier and the sets of molds supported thereon that each set of molds will alternately register with said gas supplying means and be traversed with heated gases in alternately opposite direc tions.

4. The method of drying molds which consists in connecting the tops of two vertically held molds and passing drying gases through the connected molds from the bottom end of one to the bottom end of the other.

5. The method of drying molds which consists in connecting the tops of two vertically held molds and passing drying gases through the connected molds from the bottom end of one to the bottom end of the other in alternately reversed directions. I 6. The method of drying pipe molds which consists .in suspending the moldson an intermittently moving carrier having burners arranged to register with one.of each pair of. molds in each' intermittently stationary position of the molds, connecting the tops of the molds in pairs and shifting the pairs of molds so that each mold of a pair willalternately register with a burner. I LOUIS R. LEMOINE. 

